CN116682379A - Display panel, display driving method and display device - Google Patents
Display panel, display driving method and display device Download PDFInfo
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- CN116682379A CN116682379A CN202310740354.9A CN202310740354A CN116682379A CN 116682379 A CN116682379 A CN 116682379A CN 202310740354 A CN202310740354 A CN 202310740354A CN 116682379 A CN116682379 A CN 116682379A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 208000004350 Strabismus Diseases 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 13
- 208000003464 asthenopia Diseases 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 10
- 230000002265 prevention Effects 0.000 description 7
- 244000144985 peep Species 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 description 1
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
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- 238000004020 luminiscence type Methods 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application belongs to the field of display, and particularly relates to a display panel, a display driving method and a display device, wherein the display panel comprises a plurality of rows of scanning lines, a plurality of columns of data lines and pixel units which are arranged corresponding to the crossing points of the scanning lines and the data lines, each pixel unit comprises a peep-proof sub-pixel, the display panel further comprises a first pixel driving circuit, a control line, a first power line and a second power line, the first pixel driving circuit is coupled with the control line, the first power line and the anode of the peep-proof sub-pixel, and the cathode of the peep-proof sub-pixel is connected with the second power line, wherein at least one of the control line signals and the first power line voltages of different first pixel driving circuits is different, so that the brightness of at least part of the peep-proof sub-pixels is different. The peep-proof sub-pixels have light and shade changes, so that the display content acquisition of the strabismus is disturbed, and meanwhile, the strabismus is easier to generate visual fatigue, namely, the peep-proof effect of the display panel is enhanced.
Description
Technical Field
The application belongs to the field of display, and particularly relates to a display panel, a display driving method and a display device.
Background
An OLED (Organic Light-Emitting Diode) display panel has advantages of self-luminescence, flexibility, thin thickness, high brightness, low power consumption, fast response, wide color gamut, etc., and is widely used in electronic products such as televisions, mobile phones, notebooks, etc. The display panel has a wider viewing angle, which can bring better visual experience to users, but sometimes users also want the display panel to be peep-proof, thereby effectively protecting business confidentiality and personal privacy.
In order to facilitate the switch peep-proof function, peep-proof pixels are arranged in pixel units of some display panels, and after the peep-proof pixels are started, light emitted by the peep-proof pixels interferes with light of the display pixels in oblique viewing, so that peep-proof in oblique viewing is realized; when in forward vision, the light emitted by the peep-proof pixels is blocked, so that normal display is realized. After the peep-proof pixel is closed, the display panel can normally display.
However, the pixel unit is additionally provided with the peep-proof pixel, the peep-proof pixel occupies the design space of the display pixel, the size of the peep-proof pixel is limited, the brightness of the peep-proof pixel is difficult to be high, and the peep-proof effect of the display panel is poor.
Disclosure of Invention
The application aims to provide a display panel, a display driving method and a display device, so as to enhance the peep-proof effect of the display panel.
In order to achieve the above object, the present application provides a display panel, including a plurality of rows of scan lines, a plurality of columns of data lines, and pixel units disposed corresponding to intersections of the scan lines and the data lines, at least a portion of the pixel units including peep-proof sub-pixels, the display panel further including a first pixel driving circuit, a control line, a first power line, and a second power line, the first pixel driving circuit being coupled to the control line, the first power line, and an anode of the peep-proof sub-pixel, a cathode of the peep-proof sub-pixel being connected to the second power line;
at least one of the control line signal and the first power line voltage of the first pixel driving circuit is different, so that the brightness of at least part of the peep-proof sub-pixels is different.
Optionally, the brightness of the peep-preventing sub-pixel in the 2n-1 row is different from the brightness of the peep-preventing sub-pixel in the 2n row, or the brightness of the peep-preventing sub-pixel in the 2n-1 column is different from the brightness of the peep-preventing sub-pixel in the 2n column, and n is an integer greater than 0.
Optionally, the first pixel driving circuit includes a first transistor, a first end of the first transistor is connected to the first power line, and a second end of the first transistor is connected to an anode of the peep-proof sub-pixel;
the control line comprises a first control line and a second control line, the first control line signal and the second control line signal are different, the control end of the first transistor of the 2n-1 row is connected with the first control line, and the control end of the first transistor of the 2n row is connected with the second control line.
Optionally, the display panel further includes a second pixel driving circuit, the pixel unit further includes a display sub-pixel, the second pixel driving circuit includes a second transistor and a third transistor, a control end of the second transistor is connected to the scan line, a first end of the second transistor is connected to the data line, a second end of the second transistor is connected to a control end of the third transistor, a first end of the third transistor is connected to the first power line, a second end of the third transistor is connected to an anode of the display sub-pixel, and a cathode of the display sub-pixel is connected to the second power line.
Optionally, the first pixel driving circuit includes a first transistor, a control end of the first transistor is connected to the control line, a first end of the first transistor is connected to the first power line, and a second end of the first transistor is connected to an anode of the peep-proof sub-pixel;
the first power line comprises a first power branch line and a second power branch line, the voltage of the first power branch line is different from that of the second power branch line, the first end of the first transistor of the 2n-1 row is connected with the first power branch line, and the first end of the first transistor of the 2n row is connected with the second power branch line.
Optionally, the control line includes a first control line and a second control line, the first control line signal and the second control line signal are different, the control end of the first transistor of the 2n-1 th row is connected with the first control line, and the control end of the first transistor of the 2n-1 th row is connected with the second control line.
The application also provides a display driving method, which is used for driving a display panel, the display panel comprises a plurality of pixel units arranged in an array in a row direction and a column direction, at least part of the pixel units comprise peep-proof sub-pixels, the display panel further comprises a first control line, a second control line, a first power line, a second power line and a first transistor, the control end of the first transistor in the 2n-1 row is connected with the first control line, the control end of the first transistor in the 2n row is connected with the second control line, the first end of the first transistor is connected with the first power line, the second end of the first transistor is connected with the anode of the peep-proof sub-pixels, and the cathode of the peep-proof sub-pixels is connected with the second power line, and the display driving method comprises:
acquiring a display mode of a display panel, wherein the display mode comprises a peep-proof mode and a wide view angle mode;
when the display mode of the display panel is confirmed to be the peep-proof mode, the first control line and the second control line are controlled to output different signals, so that the brightness of the peep-proof sub-pixels in the 2n-1 row is different from the brightness of the peep-proof sub-pixels in the 2n row.
Optionally, the first control line signal and the second control line signal are PWM wave signals, and waveforms of the first control line signal and the second control line signal are opposite.
Optionally, when all first ends of the first transistors are connected to the same first power line, the high level voltage of the first control line signal is different from the high level signal of the second control line signal;
when the first power line comprises a first power branch line and a second power branch line, the voltage of the first power branch line is different from that of the second power branch line, the first end of the first transistor of the 2n-1 row is connected with the first power branch line, and the first end of the first transistor of the 2n row is connected with the second power branch line, the high level voltage of the first control line signal is the same as the high level voltage of the second control line signal.
The present application also provides a display device including:
the display panel;
and the main board is connected with the display panel.
The display panel, the display driving method and the display device disclosed by the application have the following beneficial effects:
in the application, the pixel unit is arranged at the intersection point of the scanning line and the data line, the pixel unit comprises a display sub-pixel and a peep-proof sub-pixel, the first pixel driving circuit is coupled with the control line, the first power line and the anode of the peep-proof sub-pixel, the cathode of the peep-proof sub-pixel is connected with the second power line, at least one of the control line signals and the first power line voltages of the first pixel driving circuit is different, so that the brightness of at least part of the peep-proof sub-pixels is different. That is, the peep-proof sub-pixels have brightness variation, so that the display content acquisition of the strabismus is disturbed, and meanwhile, the strabismus is easier to generate visual fatigue, namely, the peep-proof effect of the display panel is enhanced.
Other features and advantages of the application will be apparent from the following detailed description, or may be learned by the practice of the application.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the application.
Fig. 2 is a schematic structural diagram of a peep-proof sub-pixel of a display panel according to an embodiment of the application.
Fig. 3 is a schematic diagram of a first pixel driving circuit according to a first embodiment of the application.
Fig. 4 is a schematic view illustrating a peep-proof principle of a display panel according to a first embodiment of the application.
Fig. 5 is a schematic diagram of a driving current of a first transistor according to a first embodiment of the application.
Fig. 6 is a schematic diagram of control signals of a first control line and a second control line according to a first embodiment of the application.
Fig. 7 is a schematic diagram of a second pixel driving circuit according to the first embodiment of the application.
Fig. 8 is a schematic structural diagram of a display panel according to a second embodiment of the application.
Fig. 9 is a schematic diagram of a driving current of a first transistor according to a second embodiment of the application.
Fig. 10 is a schematic diagram of control signals of a first control line and a second control line in a second embodiment of the application.
Fig. 11 is a flowchart of a display driving method in the third embodiment of the present application.
Fig. 12 is a schematic structural diagram of a display device in a fourth embodiment of the present application.
Reference numerals illustrate:
110. a scanning line; 120. a data line; 130. a first power line; 131. a first power branch line; 132. a second power branch line; 140. a second power line; 150. a control line; 151. a first control line; 152. a second control line;
210. displaying the sub-pixels; 220. peep-proof sub-pixels;
310. a first transistor; 320. a second transistor; 330. a third transistor; 340. a storage capacitor;
100. a display panel; 200. and a main board.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The application will be described in further detail with reference to the drawings and the specific examples. It should be noted that the technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
Example 1
Referring to fig. 1, the display panel in this embodiment includes a plurality of rows of scan lines 110, a plurality of columns of data lines 120, and pixel units corresponding to the intersections of the scan lines 110 and the data lines 120, where each pixel unit includes at least one display sub-pixel 210, and each display sub-pixel 210 is an organic light emitting diode. Each display sub-pixel 210 is correspondingly connected to a scanning line 110 in a row and a data line 120 in a column. In this embodiment, the pixel unit includes a plurality of display sub-pixels 210 of different colors, namely, a red display sub-pixel 210 (R), a green display sub-pixel 210 (G), and a blue display sub-pixel 210 (B), so as to implement RGB display. At least some of the pixel units further include at least one peep-proof sub-pixel 220 (F), and the peep-proof sub-pixel 220 may be a red sub-pixel, a green sub-pixel, a blue sub-pixel, a yellow sub-pixel, or a white sub-pixel.
Referring to fig. 2 and 3, the display panel further includes a first pixel driving circuit, a control line 150, a first power line 130, and a second power line 140. The first pixel driving circuit is coupled to the control line 150, the first power line 130, and the anode of the peep-proof sub-pixel 220, and the cathode of the peep-proof sub-pixel 220 is connected to the second power line 140. At least one of the control line 150 signal and the first power line 130 voltage of the different first pixel driving circuits is different, so that at least part of the peep-preventing sub-pixels 220 have different brightness. For example, the peep-proof sub-pixel 220 has two different brightnesses, wherein a part of the peep-proof sub-pixel 220 has a first brightness and a part of the peep-proof sub-pixel 220 has a second brightness. The privacy sub-pixel 220 may also have more than two different brightnesses, as the case may be.
In order to facilitate the switch peep-proof function, peep-proof sub-pixels 220 are disposed in pixel units of some display panels. Referring to fig. 4, after the peep-proof sub-pixel 220 is turned on, when in oblique viewing, the light emitted from the peep-proof sub-pixel 220 interferes with the light of the display sub-pixel 210, so as to realize narrow viewing angle display, i.e. realize peep-proof in oblique viewing; when in forward vision, the light emitted by the peep-proof sub-pixel 220 is blocked, so that normal display is realized. After the peep-proof sub-pixel 220 is turned off, the display panel can display at a wide viewing angle, i.e. normal display. However, the extra peep-proof sub-pixel 220 occupies the design space of the display sub-pixel 210, the size of the peep-proof sub-pixel 220 is limited, and the brightness of the peep-proof sub-pixel 220 is difficult to be high, resulting in poor peep-proof effect of the display panel.
In this embodiment, the pixel unit is disposed at the intersection of the scan line 110 and the data line 120, and the pixel unit includes a display sub-pixel 210 and a peep-proof sub-pixel 220, where the first pixel driving circuit is coupled to the control line 150, the first power line 130 and the anode of the peep-proof sub-pixel 220, and the cathode of the peep-proof sub-pixel 220 is connected to the second power line 140, and at least one of the signals of the control line 150 and the voltages of the first power line 130 of the first pixel driving circuit is different, so that at least part of the peep-proof sub-pixels 220 have different brightness. That is, the peep-proof sub-pixel 220 has a light and shade change, which can interfere the acquisition of the display content by the strabismus, and can make the strabismus generate visual fatigue more easily, i.e. enhance the peep-proof effect of the display panel.
It should be noted that the pixel unit includes a red display sub-pixel 210, a green display sub-pixel 210, a blue display sub-pixel 210 and a peep-proof sub-pixel 220, and the red display sub-pixel 210, the green display sub-pixel 210, the blue display sub-pixel 210 and the peep-proof sub-pixel 220 may be sequentially arranged in the row direction as shown in the figure, but the application is not limited thereto, and the positions of the red display sub-pixel 210, the green display sub-pixel 210, the blue display sub-pixel 210 and the peep-proof sub-pixel 220 may be interchanged or discharged into other shapes, as the case may be.
Referring to fig. 2 and 3, the brightness of the 2n-1 th row of the peep-preventing sub-pixel 220 is different from the brightness of the 2 n-th row of the peep-preventing sub-pixel 220, or the brightness of the 2n-1 th column of the peep-preventing sub-pixel 220 is different from the brightness of the 2 n-th column of the peep-preventing sub-pixel 220, n is an integer greater than 0. That is, the brightness of the odd-numbered row of the peep-preventing sub-pixels 220 is different from the brightness of the even-numbered row of the peep-preventing sub-pixels 220, or the brightness of the odd-numbered column of the peep-preventing sub-pixels 220 is different from the brightness of the even-numbered column of the peep-preventing sub-pixels 220.
The brightness of the odd numbered peep-proof sub-pixels 220 is different from the brightness of the even numbered peep-proof sub-pixels 220, or the brightness of the odd numbered peep-proof sub-pixels 220 is different from the brightness of the even numbered peep-proof sub-pixels 220, the display picture formed by the peep-proof sub-pixels 220 is a stripe picture with brightness change, so that the display content acquisition of strabismus is interfered, and meanwhile, visual fatigue is generated in strabismus more easily, namely, the peep-proof effect of the display panel is enhanced.
As an example, referring to fig. 2, 3 and 5, the first pixel driving circuit includes a first transistor 310, a first terminal of the first transistor 310 is connected to the first power line 130, and a second terminal of the first transistor 310 is connected to the anode of the peep-preventing sub-pixel 220. Wherein the control line 150 comprises a first control line 151 and a second control line 152, the first control line 151 signal (FVGO) and the second control line 152 signal (fpge) being different. For example, the first control line 151 is at a voltage of 4V and the second control line 152 is at a voltage of 6V. The control terminal of the first transistor 310 of row 2n-1 is connected to the first control line 151, and the control terminal of the first transistor 310 of row 2n is connected to the second control line 152. The control terminal, the first terminal, and the second terminal of the first transistor 310 may be a gate, a drain, and a source, respectively.
The first transistor 310 is a driving transistor of the peep-proof sub-pixel 220, and the voltage difference between the gate and the source of the first transistor 310 determines the turn-on degree of the first transistor 310, that is, the control line 150 determines the turn-on degree of the first transistor 310, and the larger the turn-on degree of the first transistor 310 is, the larger the source voltage Vs of the first transistor 310 is, the larger the driving current Ids is, and the higher the brightness of the peep-proof sub-pixel 220 is.
If the signal of the first control line 151 is different from the signal of the second control line 152, the turn-on degree of the first transistor 310 in the 2n-1 row is different from the turn-on degree of the first transistor 310 in the 2n row, so that the brightness of the peep-proof sub-pixel 220 in the 2n-1 row is different from the brightness of the peep-proof sub-pixel 220 in the 2n row.
Referring to fig. 6, the first control line 151 signal and the second control line 152 signal are PWM (pulse width modulation) wave signals, and the periods of the first control line 151 signal and the second control line 152 signal are two frames. The high level voltage of the first control line 151 signal is 4V, the low level voltage of the first control line 151 signal is-7V, and the ratio of the high level of the first control line 151 signal to the low level of the first control line 151 signal is 1. The high level voltage of the second control line 152 signal is 6V, the low level voltage of the second control line 152 signal is-7V, and the ratio of the high level of the second control line 152 signal to the low level of the second control line 152 signal is 1. The waveforms of the first control line 151 signal and the second control line 152 signal are opposite, that is, when the first control line 151 signal is at a high level, the second control line 152 signal is at a low level, and when the first control line 151 signal is at a low level, the second control line 152 signal is at a high level.
The signals of the first control line 151 and the second control line 152 are PWM wave signals, the waveforms of the signals of the first control line 151 and the signals of the second control line 152 are opposite, and the high level voltages are different, so that the peep-proof sub-pixels 220 in the odd lines and the peep-proof sub-pixels 220 in the even lines have different brightness and alternately flash, and due to the design, visual fatigue can be generated more easily in strabismus, and the peep-proof effect of the display panel is enhanced.
The periods of the signals of the first control line 151 and the second control line 152, the high level voltage and the low level voltage, and the high level and the flat voltage duty ratio may be set as appropriate.
Referring to fig. 1 and 7, the display panel further includes a second pixel driving circuit for driving the display sub-pixel 210. The second pixel driving circuit includes a second transistor 320 and a third transistor 330, the control terminal of the second transistor 320 is connected to the scan line 110, the first terminal of the second transistor 320 is connected to the data line 120, the second terminal of the second transistor 320 is connected to the control terminal of the third transistor 330, the first terminal of the third transistor 330 is connected to the first power line 130, the second terminal of the third transistor 330 is connected to the anode of the display sub-pixel 210, and the cathode of the display sub-pixel 210 is connected to the second power line 140. That is, the display sub-pixel 210 and the peep-proof sub-pixel 220 share a power line. The first power line 130 may have a voltage of 6V and the second power line 140 may have a voltage of 0V. The control terminal, the first terminal, and the second terminal of the second transistor 320 and the third transistor 330 may be a gate, a drain, and a source thereof, respectively.
The display sub-pixel 210 and the peep-proof sub-pixel 220 share a power line, so that the wiring of the display panel can be reduced, and the pixel aperture ratio can be improved.
It should be noted that the second pixel driving circuit further includes a storage capacitor 340, and the storage capacitor 340 is used for maintaining the data voltage. In addition, the second pixel driving circuit may further include a threshold voltage compensation unit and the like, as the case may be.
Example two
Referring to fig. 8 and 9, the first pixel driving circuit includes a first transistor 310, a control terminal of the first transistor 310 is connected to the control line 150, a first terminal of the first transistor 310 is connected to the first power line 130, and a second terminal of the first transistor 310 is connected to the anode of the peep-preventing sub-pixel 220.
The first power line 130 includes a first power branch line 131 and a second power branch line 132, and the first power branch line 131 voltage VDD1 and the second power branch line 132 voltage VDD2 are different. For example, the first power supply branch line 131 has a voltage of 4V, the second power supply branch line 132 has a voltage of 8V, and the second power supply line 140 has a voltage of 0V. The first terminal of the first transistor 310 of row 2n-1 is connected to the first power supply branch line 131, and the first terminal of the first transistor 310 of row 2n is connected to the second power supply branch line 132. The control line 150 signals of all the first transistors 310 may be the same, for example, the control line 150 voltage of the first transistor 310 is 7V.
The voltage difference between the first power line 130 and the second power line 140 affects the source-drain voltage difference of the first transistor 310 and the cathode-anode voltage difference of the peep-proof sub-pixel 220, and thus affects the magnitude of the driving current Ids. The larger the voltage of the first power supply line 130, the larger the source voltage Vs of the first transistor 310, the larger the driving current Ids.
The voltage of the first power branch line 131 is smaller than that of the second power branch line 132, and the brightness of the odd-numbered row of peep-preventing sub-pixels 220 is smaller than that of the even-numbered row of peep-preventing sub-pixels 220.
Referring to fig. 8 to 10, the control line 150 includes a first control line 151 and a second control line 152, the first control line 151 and the second control line 152 are different in signal, the control terminal of the first transistor 310 of the 2n-1 th row is connected to the first control line 151, and the control terminal of the first transistor 310 of the 2 n-th row is connected to the second control line 152.
The first control line 151 signal and the second control line 152 signal are PWM wave signals, and the periods of the first control line 151 signal and the second control line 152 signal are two frames. The high level voltage of the first control line 151 signal is 7V, the low level voltage of the first control line 151 signal is-7V, and the ratio of the high level of the first control line 151 signal to the low level of the first control line 151 signal is 1. The high level voltage of the second control line 152 signal is 7V, the low level voltage of the second control line 152 signal is-7V, and the ratio of the high level of the second control line 152 signal to the low level of the second control line 152 signal is 1. The waveforms of the first control line 151 signal and the second control line 152 signal are opposite, that is, when the first control line 151 signal is at a high level, the second control line 152 signal is at a low level, and when the first control line 151 signal is at a low level, the second control line 152 signal is at a high level.
The signals of the first control line 151 and the second control line 152 are PWM wave signals, the waveforms of the signals of the first control line 151 and the second control line 152 are opposite, the odd-line peep-proof sub-pixels 220 and the even-line peep-proof sub-pixels 220 have different brightness, and the odd-line peep-proof sub-pixels and the even-line peep-proof sub-pixels 220 flash alternately, so that visual fatigue can be generated more easily in strabismus due to the design, and the peep-proof effect of the display panel is enhanced.
It should be noted that, the display sub-pixel 210 may use one of the first power branch line 131 and the second power branch line 132 as a power source, but not limited thereto, and the display sub-pixel 210 may be additionally provided with a power line, as the case may be.
Example III
The present embodiment provides a display driving method for driving a display panel, where the display panel may include the display panels disclosed in the first and second embodiments.
The display panel includes a plurality of pixel units arranged in an array in a row direction and a column direction, at least a portion of the pixel units include a peep-proof sub-pixel 220, the display panel further includes a first control line 151, a second control line 152, a first power line 130, a second power line 140, and a first transistor 310, a control end of the first transistor 310 in the 2n-1 row is connected to the first control line 151, a control end of the first transistor 310 in the 2n row is connected to the second control line 152, a first end of the first transistor 310 is connected to the first power line 130, a second end of the first transistor 310 is connected to an anode of the peep-proof sub-pixel 220, and a cathode of the peep-proof sub-pixel 220 is connected to the second power line 140. Referring to fig. 11, the display driving method includes:
s100: acquiring a display mode of a display panel, wherein the display mode comprises a peep-proof mode and a wide view angle mode;
s200: when the display mode of the display panel is confirmed to be the peep-proof mode, the first control line 151 and the second control line 152 are controlled to output different signals, so that the brightness of the peep-proof sub-pixel 220 of the 2n-1 row is different from the brightness of the peep-proof sub-pixel 220 of the 2n row.
The signals of the first control line 151 and the second control line 152 may be different, and may be different in voltage or waveform.
The brightness of the peep-proof sub-pixel 220 in the 2n-1 row is different from the brightness of the peep-proof sub-pixel 220 in the 2n row, namely, the peep-proof sub-pixel 220 has brightness change, so that the display content acquisition of the strabismus is interfered, and meanwhile, the strabismus is easier to generate visual fatigue, namely, the peep-proof effect of the display panel is enhanced.
In some embodiments, the first control line 151 signal and the second control line 152 signal are PWM wave signals, and the waveforms of the first control line 151 signal and the second control line 152 signal are opposite.
The signals of the first control line 151 and the second control line 152 are PWM wave signals, the waveforms of the signals of the first control line 151 and the second control line 152 are opposite, the odd-line peep-proof sub-pixels 220 and the even-line peep-proof sub-pixels 220 have different brightness, and the odd-line peep-proof sub-pixels and the even-line peep-proof sub-pixels 220 flash alternately, so that visual fatigue can be generated more easily in strabismus due to the design, and the peep-proof effect of the display panel is enhanced.
Referring to fig. 2, when all first terminals of the first transistors 310 are connected to the same first power line 130, a high level voltage of the first control line 151 signal and a high level signal of the second control line 152 signal are different.
The first transistor 310 is a driving transistor of the peep-preventing sub-pixel 220, and the voltage difference between the gate and the source of the first transistor 310 determines the turn-on degree of the first transistor 310, so that the larger the turn-on degree of the first transistor 310 is, the larger the source voltage Vs of the first transistor 310 is, the larger the driving current Ids is, and the higher the brightness of the peep-preventing sub-pixel 220 is. The high level voltage of the first control line 151 signal is controlled to be different from the high level signal of the second control line 152 signal, so that the brightness of the 2n-1 row peep-proof sub-pixel 220 is different from the brightness of the 2n row peep-proof sub-pixel 220, the wiring of the display panel can be reduced, and the aperture ratio of the display panel can be improved.
Referring to fig. 8, when the first power line 130 includes the first and second power branch lines 131 and 132, the voltages of the first and second power branch lines 131 and 132 are different, the first terminal of the first transistor 310 of the 2n-1 th row is connected to the first power branch line 131, and the first terminal of the first transistor 310 of the 2 n-th row is connected to the second power branch line 132, the high level voltage of the first control line 151 signal and the high level voltage of the second control line 152 signal are the same.
The high level voltage of the first control line 151 signal is the same as the high level voltage of the second control line 152 signal, and the control signal circuit can be simplified.
The display panel works: the user selects a display mode, wherein the display mode comprises a peep-proof mode and a wide view angle mode, and the peep-proof mode can be further thinned into: normally bright peep prevention and flicker peep prevention.
If the user selects the wide viewing angle mode, the first control line 151 and the second control line 152 control the first transistor 310 to be turned off, and the peep-proof sub-pixel 220 to be turned off. For a display panel in which the peep-preventing sub-pixel 220 and the display sub-pixel 210 are independently powered, the first power line 130 of the peep-preventing sub-pixel 220 also stops powering.
If the user selects normal-bright peep prevention, the signals of the first control line 151 and the second control line 152 may be dc signals, and the voltages of the signals of the first control line 151 and the second control line 152 are the same or different, so that the peep prevention sub-pixel 220 is kept on. In the normally-bright peep-preventing mode, the brightness of the peep-preventing sub-pixel 220 is adjustable.
If the user selects the flicker prevention, the signals of the first control line 151 and the second control line 152 are PWM wave signals and have opposite waveforms, and the peep prevention sub-pixels 220 in the odd numbered rows, the peep prevention sub-pixels 220 in the even numbered rows, and the alternate flicker light emission. In the flicker-prevention mode, the flicker frequency and brightness of each row of the peep-prevention subpixels 220 can be adjusted.
Example IV
Referring to fig. 12, the display device of the present embodiment includes a display panel 100 and a main board 200, wherein the main board 200 is connected to the display panel 100, and the display panel 100 includes the display panel 100 disclosed in the first and second embodiments.
The display device includes a display panel 100, in which a pixel unit is disposed at an intersection of a scan line 110 and a data line 120, the pixel unit includes a display sub-pixel 210 and a peep-proof sub-pixel 220, a first pixel driving circuit is coupled to a control line 150, a first power line 130 and an anode of the peep-proof sub-pixel 220, a cathode of the peep-proof sub-pixel 220 is connected to a second power line 140, and at least one of a signal of the control line 150 and a voltage of the first power line 130 of the first pixel driving circuit are different, so that at least part of the peep-proof sub-pixels 220 have different brightness. That is, the peep-proof sub-pixel 220 has a light and shade change, which can interfere with the acquisition of the display content by the strabismus, and can make the strabismus generate visual fatigue more easily, so that the peep-proof effect of the display panel 100, i.e. the peep-proof effect of the display device, is enhanced.
The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly, and may be fixedly attached, detachably attached, or integrally formed, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, reference to the terms "some embodiments," "exemplary," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present application have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made in the above embodiments by those skilled in the art within the scope of the application, which is therefore intended to be covered by the appended claims and their equivalents.
Claims (10)
1. The display panel comprises a plurality of rows of scanning lines, a plurality of columns of data lines and pixel units which are arranged corresponding to the crossing points of the scanning lines and the data lines, and is characterized in that at least part of the pixel units comprise peep-proof sub-pixels, the display panel further comprises a first pixel driving circuit, a control line, a first power line and a second power line, the first pixel driving circuit is coupled with the control line, the first power line and the anode of the peep-proof sub-pixel, and the cathode of the peep-proof sub-pixel is connected with the second power line;
at least one of the control line signal and the first power line voltage of the first pixel driving circuit is different, so that the brightness of at least part of the peep-proof sub-pixels is different.
2. The display panel according to claim 1, wherein a luminance of the peep-preventing sub-pixel of the 2n-1 th row and a luminance of the peep-preventing sub-pixel of the 2 n-th row are different, or a luminance of the peep-preventing sub-pixel of the 2n-1 th column and a luminance of the peep-preventing sub-pixel of the 2 n-th column are different, n is an integer greater than 0.
3. The display panel according to claim 2, wherein the first pixel driving circuit includes a first transistor, a first end of the first transistor is connected to the first power line, and a second end of the first transistor is connected to an anode of the peep-proof sub-pixel;
the control line comprises a first control line and a second control line, the first control line signal and the second control line signal are different, the control end of the first transistor of the 2n-1 row is connected with the first control line, and the control end of the first transistor of the 2n row is connected with the second control line.
4. A display panel according to claim 3, wherein the display panel further comprises a second pixel driving circuit, the pixel unit further comprises a display sub-pixel, the second pixel driving circuit comprises a second transistor and a third transistor, a control terminal of the second transistor is connected to the scan line, a first terminal of the second transistor is connected to the data line, a second terminal of the second transistor is connected to a control terminal of the third transistor, a first terminal of the third transistor is connected to the first power line, a second terminal of the third transistor is connected to an anode of the display sub-pixel, and a cathode of the display sub-pixel is connected to the second power line.
5. The display panel according to claim 2, wherein the first pixel driving circuit includes a first transistor, a control terminal of the first transistor is connected to the control line, a first terminal of the first transistor is connected to the first power line, and a second terminal of the first transistor is connected to an anode of the peep-proof sub-pixel;
the first power line comprises a first power branch line and a second power branch line, the voltage of the first power branch line is different from that of the second power branch line, the first end of the first transistor of the 2n-1 row is connected with the first power branch line, and the first end of the first transistor of the 2n row is connected with the second power branch line.
6. The display panel according to claim 5, wherein the control lines include a first control line and a second control line, the first control line signal and the second control line signal are different, the control terminal of the first transistor of row 2n-1 is connected to the first control line, and the control terminal of the first transistor of row 2n is connected to the second control line.
7. The display driving method is used for driving a display panel, and is characterized in that the display panel comprises a plurality of pixel units arranged in an array in a row direction and a column direction, at least part of the pixel units comprise peep-proof sub-pixels, the display panel further comprises a first control line, a second control line, a first power line, a second power line and a first transistor, the control end of the first transistor in the 2n-1 row is connected with the first control line, the control end of the first transistor in the 2n row is connected with the second control line, the first end of the first transistor is connected with the first power line, the second end of the first transistor is connected with the anode of the peep-proof sub-pixel, and the cathode of the peep-proof sub-pixel is connected with the second power line, and the display driving method comprises:
acquiring a display mode of a display panel, wherein the display mode comprises a peep-proof mode and a wide view angle mode;
when the display mode of the display panel is confirmed to be the peep-proof mode, the first control line and the second control line are controlled to output different signals, so that the brightness of the peep-proof sub-pixels in the 2n-1 row is different from the brightness of the peep-proof sub-pixels in the 2n row.
8. The display driving method according to claim 7, wherein the first control line signal and the second control line signal are PWM wave signals, and waveforms of the first control line signal and the second control line signal are opposite.
9. The display driving method according to claim 8, wherein when first terminals of all the first transistors are connected to the same first power supply line, a high level voltage of the first control line signal and a high level signal of the second control line signal are different;
when the first power line comprises a first power branch line and a second power branch line, the voltage of the first power branch line is different from that of the second power branch line, the first end of the first transistor of the 2n-1 row is connected with the first power branch line, and the first end of the first transistor of the 2n row is connected with the second power branch line, the high level voltage of the first control line signal is the same as the high level voltage of the second control line signal.
10. A display device, comprising:
the display panel according to any one of claims 1 to 6;
and the main board is connected with the display panel.
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